Thanks Fast Fred,
Very glad you told me what they are.
i was wondering about these little holes, they do seem very strange when first seeing them.
at first i thought a hole had burnt through ,then when i noticed all three i knew it must be stock.

So is it a must do to get rid of these when re-building ?
Do they cause a drop in normal compression ? i would think they do to be honest.
and surely a drop in compression = less power ?????
is this just on the 60hp or would the 70hp be the same ?.

and where is the best place to get some parts for a re-build ? please dont say BRP as in the uk they
are just so high prices it ridiculous.

and thanks again for info Fast Fred

phill